کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4547303 1627106 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
TRLFS characterization of Eu(III)-doped synthetic organo-hectorite
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
TRLFS characterization of Eu(III)-doped synthetic organo-hectorite
چکیده انگلیسی

Europium(III) was coprecipitated with the clay mineral hectorite, a magnesian smectite, following a multi-step synthesis procedure. Different Eu(III) species associated with the proceeding synthetic hectorite were characterized by selectively exciting the 5D0→7F0 transition at low temperature (T < 20 K). Fluorescence decay times indicated that Eu(III) ions may be incorporated in the octahedral layer of the brucite precursor as well as in the octahedral sheet of the clay mineral. The excitation spectra indicated that the substitution of the divalent Mg by the trivalent Eu induced local structural deformation.This investigation implements the molecular-level understanding of the f element structural incorporation into the octahedral layer of sheet silicates by coprecipitation with clay minerals from salt solutions at 100 °C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Contaminant Hydrology - Volume 102, Issues 3–4, 12 December 2008, Pages 253–262
نویسندگان
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